Question

Sita and geetha can do a job in 15 days and 10 days respectivel. They began to work together but sita leaves after some days and geetha finishes remaining job in 5 days. After how many days did sita leave ?

Answer 1

Answer:

Step-by-step explanation:

Sita's job in one day=1/15

Geeta's job in one day=1/10

Let Sita worked for x days

work by  Sita=x/15

Geeta worked for x+5 days

her work=(x+5)/10

so total work=x/15+(x+5)/10=1

Multiplying by 30 we get

30x/15+3*(x+5)=30

2x+3x+15=30

5x=15

x=3

Hence Sita left after 3 days